n-Alkan-2-one distributions in a northeastern China peat core spanning the last 16 kyr

Yanhong Zheng, Weijian Zhou, Xiaomin Liu, Chuanlun Zhang

Research output: Contribution to journalArticle (Academic Journal)peer-review

27 Citations (Scopus)


Most research on long chain methyl ketones has focused on their origins and distributions. Their application in paleoclimate studies is less common than that of other n-alkyl lipids. The goal of this research was to explore this potential by studying n-alkan-2-ones from the Hani peat sequence in northeastern China. They were identified using gas chromatography–mass spectrometry (GC–MS) and showed a distribution ranging from C19 to C31 with a strong odd/even predominance. This type of distribution is considered to derive from Sphagum and microbial oxidation of n-alkanes. Comparison with climate sensitive indicators and macrofossil analysis shows that microbial oxidation of n-alkanes derived from higher plants was enhanced during the warm early Holocene period. This led us to develop three n-alkan-2-one proxies – C27/RC23–31 (C27/HMW-KET), carbon preference index (CPIH-KET) and average chain length (ACL(27–31)-KET) – as possible indicators of paleoclimate in the peat-forming environment. These proxies, in combination with C27 n-alkane dD values and peat cellulose d18O records, might allow examination of paleo-ecosystem behavior during climatic evolution in northeastern China over the past 16,000 yr.
Original languageEnglish
Pages (from-to)25-30
JournalOrganic Geochemistry
Issue number1
Publication statusPublished - Jan 2011


Dive into the research topics of 'n-Alkan-2-one distributions in a northeastern China peat core spanning the last 16 kyr'. Together they form a unique fingerprint.

Cite this